What’s Vulnerable › Vulnerabilities

CVE-2026-47137: vm2: GHSA-8hg8-63c5-gwmx patch bypass: nesting:true without explicit require still allows full RCE

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-12 · updated 2026-10-26
• Weakness: CWE-913

Description

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, the fix for GHSA-8hg8-63c5-gwmx (CVE-2023-37903) introduced a check in nodevm.js line 263 that blocks the combination nesting: true + require: false. However, the check uses strict equality (options.require === false), which is trivially bypassed by omitting the require option entirely. When require is not specified, options.require is undefined, not false. The strict equality check fails, so the security guard is skipped. Immediately after (line 280), the destructuring default require: requireOpts = false assigns requireOpts = false, producing the exact configuration the patch was designed to prevent. This issue has been patched in version 3.11.4.

Affected products

• patriksimek vm2: before 3.11.4

References

• https://github.com/advisories/GHSA-g644-9gfx-q4q4
• https://github.com/patriksimek/vm2/commit/01a7552add345d5a6862623884e6b79a85bf0568
• https://github.com/patriksimek/vm2/commit/86ab819f202c3a8dad88cef5705f2e416c5188d7
• https://github.com/patriksimek/vm2/releases/tag/v3.11.4
• https://github.com/patriksimek/vm2/security/advisories/GHSA-m4wx-m65x-ghrr

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